The resulting dataset includes information on biophysical and socioeconomic variables that potentially influence household-level fluxes of elements. Using this method to study element fluxes at the household level allows us to explicitly link consumption choices and element fluxes.

Survey results. Make and model of each car or truck owned by household. Odometer reading, year and month of purchase, number of cylinders and odometer reading at time of survey. MPG estimate from US EPA vehicle databases by vehicle.